Torque Converter Clutch Cycling/Shudder/Chatter
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2002 Lincoln Navigator, 2002 Ford Expedition, 2001 Lincoln Navigator, 2001 Ford RV Cutaway, and 2001 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Fluid condition, improperly torqued valve body bolts (gasket damaged), torque converter clutch solenoid, pump assembly, stator support and torque converter assembly. See TORQUE CONVERTER under COMPONENT TESTS in appropriate OVERHAUL article.